Function and Scatterplot Review

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles? 

• 50 min

• 80 min

• 45 min

• 60 min

In a scatterplot, an outlier...

• ...is something we didn't learn 8th grade

• ...is a puppet with a long nose named Pinocchio

• ...is a point that is far outside the main cluster of points/ordered pairs

• ...is a really naughty point who doesn't tell the truth when outside

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam? 

• 65

• 92

• 70

• 76

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Write the an equation for the graph shown.

• -2y = x + 4

• 2y = x +2

• y = 1/2x + 2

• 2y = -x - 4

Based on the scatterplot, what is the best prediction of the resting heart rate, in beats per minute, of a person who exercises an average of 8 hours each week?

• 30 beats per minute

• 50 beats per minute

• 55 beats per minute

• 60 beats per minute

Which function (or equation) best represents the relationship in the graph?

• y = 5x

• y = 1/5x

• y = 2x

• y = 1/2x

Melissa is saving the $30 she earned for washing her mom's car.  She earns $10 every week for doing other chores, which she also saves.  Which equation represents the amount of money Melissa will have after x weeks.

• y = 30x +10

• y = 30 + 10x

• y = 10x - 30

• y = 10x

Which function (or equation) is best represented by the graph?

• y = 1/2x + 3

• y = -1/2x + 3

• y = -2x +3

• y = 2x - 3

Which equation best represents the information in the table?

• c =0.10m + 30

• c = 30m + .10

• c = .50m + 30

• c =30m + .50